Improved centring-awl



"uitrit istat Letters Patent No. 93,937, dated August 1i', 1869; antedctezl Februar/ry 17, 1869;

IMPROVED cnNTR'ING-AWL.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, DANIEL A. Willcox, of Woodstock, in the county of Viiudsor, and State of'Vermont, have invented a nea1 and improved Carpenters Tool, which maybe termed a Centring-Awl, and which is designed to be used in the hanging of doors.`

'lhe respective parts of said tool are so shaped and arranged with each other, that a puncture for the reception of a lscrew-point can, be unerringly andquickly formed in the exactcentre of each countersink-ap'erture of a door-but, thereby facilitating the hanging of doors, and enabling the same, in all cases, to be hung in a perfectly vertical position.

The accompanying drawing` is a'longitudinal section of my said new and improved carpenters tool.

A is a wooden stock, or handle, which embraces and is securely combined with the metallic tube B C. The lower end of the portion Cof this tubeisbevelled to about the average sizeof the cou'ntersnks in doorbuts.

The shape of the aWl-shank D E, which `works in the tube'B C is clearly shown in the accompanying' drawing. The upper portion D of said shank fits pretty closely within the upper portion of the tube B C. I he said portion D of the awl-shank terminates in an abrupt shoulder at the point where. the smaller diameter E of' the same commencest and/this latter portion'of the awl-shank passes through the opening in the lower end of the tube B C, which is of' such a sizeas to accurately guide the said shank in its reciprocating movements.

The larger interior diameter-poi' the tube .B G terminatesin an abrupt shoulder at the point Where the smaller interior diameter of the portion C thereof commences.

A spiral spring, G, which embraces the portion E of the awl-shank, acts and reacts against the shoulder, at

the junction otr-the diiierent interior diameters of the tube B C, and the shoulder, at' the junction of the different diameters ot' the :wvl-shank D E.

A'lhe extent of' the reciprocating'movements of the V`A awl-shank' are controlled by a pin, H, which is'itted into apertures .in the sides ofthe portion B of' the tube B C, and Winch-works in an abrupt shouldered recess cut in one side of the upper portion D of t-he owl-shank', as shown in the accompanying drawing.

ltwilltherefore be perceived, that by placing the bevelled head of my said improved carpenters to ol in the countersink of a but, and then striking a light blow upon the head F of the awl-shank, which forms a portion of vsaid tool, the awl-point at ,the end of said shank will be driven into the wood. the desired distance, to form the screw-receiving puncture at the precise centre of the said countersink.

I do not intend .to limit myself to the exact method of construction herein set forth, but shall vary the same as circumstances may require, while I accomplish the desired end by means substantially the same as those hereinpartcularly set forth.l Y v Haring thus .fully'described my improved carpen ters tool; l v 4 What I claim therein as my invention, and desire to secure by Letters Patent, is-

1. The bevelled head of the tube B C, which encloses the puucturing-pint of the shank D E, andis so ar ranged therewith as to serve the purpose of guiding the said point through vthe centres of countersink-but apertures, in the hanging of doors, Ste., and thereby insuring the starting of each so'rewin the centre of' each of said apertures, substantially as herein set forth.

. 2. The combination-of the tubular'and pointed v metallic portions of the said improved carpenters to'ol, with a suitable wooden handle, substantially as herein set forth.

` DANIEL A. WILOOX.'

Witnesses:

JOHN C. NUTTING, JOHN W. NUTTING. 

